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  3. thousands of clogged coronary arteries are surgically repaired every year...

Question: thousands of clogged coronary arteries are surgically repaired every year...

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Thousands of clogged coronary arteries are surgically repaired every year, only to have many of these arteries narrow again not too long after surgery (restenosis). An NIH study was conducted to help determine whether infection with a common type of virus, cytomegalovirus (CMV), contributed to coronary restenosis. Forty-nine of the subjects showed serological evidence of CMV infection, while 26 showed no such evidence. In the CMV+ group, 21 individuals restenosed within 6 months of atherectomy. In the CMV− group, 2 individuals restenosed. Is there sufficient evidence to support the NIH claim that CMV contributes to coronary restenosis?

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